package com.ruoyi.module.yzx.tool;
import com.google.zxing.*;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.*;
import java.util.Hashtable;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

import com.ruoyi.common.config.RuoYiConfig;
import org.apache.tomcat.util.http.fileupload.IOUtils;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.util.List;
import java.util.Map;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;


/**
 * 二维码生成工具类
 */
public class QrCodeUtils {
    private static final String CHARSET = "utf-8";
    public static final String FORMAT = "JPG";
    // 二维码尺寸
    private static final int QRCODE_SIZE = 300;
    // LOGO宽度
    private static final int LOGO_WIDTH = 60;
    // LOGO高度
    private static final int LOGO_HEIGHT = 60;

    /**
     * 生成二维码
     *
     * @param content      二维码内容
     * @param logoPath     logo地址
     * @param needCompress 是否压缩logo
     * @return 图片
     * @throws Exception
     */
    public static BufferedImage createImage(String content, String logoPath, boolean needCompress) throws Exception {
        Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
        hints.put(EncodeHintType.CHARACTER_SET, CHARSET);
        hints.put(EncodeHintType.MARGIN, 1);
        BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE,
                hints);
        int width = bitMatrix.getWidth();
        int height = bitMatrix.getHeight();
        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        for (int x = 0; x < width; x++) {
            for (int y = 0; y < height; y++) {
                image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);
            }
        }
        if (logoPath == null || "".equals(logoPath)) {
            return image;
        }
        // 插入图片
        QrCodeUtils.insertImage(image, logoPath, needCompress);
        return image;
    }

    /**
     * 插入LOGO
     *
     * @param source       二维码图片
     * @param logoPath     LOGO图片地址
     * @param needCompress 是否压缩
     * @throws IOException
     */
    private static void insertImage(BufferedImage source, String logoPath,
                                    boolean needCompress) throws Exception {
        File file = new File(logoPath);
        if (!file.exists()) {
            System.err.println(""+logoPath+"   该文件不存在！");
            return;
        }
        Image src = ImageIO.read(new File(logoPath));
        int width = src.getWidth(null);
        int height = src.getHeight(null);
        if (needCompress) { // 压缩LOGO
            if (width > LOGO_WIDTH) {
                width = LOGO_WIDTH;
            }
            if (height > LOGO_HEIGHT) {
                height = LOGO_HEIGHT;
            }
            Image image = src.getScaledInstance(width, height,
                    Image.SCALE_SMOOTH);
            BufferedImage tag = new BufferedImage(width, height,
                    BufferedImage.TYPE_INT_RGB);
            Graphics g = tag.getGraphics();
            g.drawImage(image, 0, 0, null); // 绘制缩小后的图
            g.dispose();
            src = image;
        }
        // 插入LOGO
        Graphics2D graph = source.createGraphics();
        int x = (QRCODE_SIZE - width) / 2;
        int y = (QRCODE_SIZE - height) / 2;
        graph.drawImage(src, x, y, width, height, null);
        Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);
        graph.setStroke(new BasicStroke(3f));
        graph.draw(shape);
        graph.dispose();
    }

    /**
     * 生成二维码（指定路径保存）
     *
     * @param content 内容
     * @param imgPath logo图片地址（内嵌图片）
     * @param destPath 生成二维码存放地址
     * @param needCompress 是否压缩logo
     * @throws Exception
     */
    public static void encode(String content, String imgPath, String destPath, boolean needCompress) throws Exception {
        BufferedImage image = QrCodeUtils.createImage(content, imgPath, needCompress);
        mkdirs(destPath);
        // String file = new Random().nextInt(99999999)+".jpg";
        // ImageIO.write(image, FORMAT_NAME, new File(destPath+"/"+file));
        ImageIO.write(image, FORMAT, new File(destPath));
    }

    /**
     * 生成二维码(直接将二维码以图片输出流返回）
     *
     * @param content 内容
     * @param imgPath logo图片地址（内嵌图片）
     * @param needCompress 是否压缩logo
     * @return
     * @throws Exception
     */
    public static BufferedImage encode(String content, String imgPath, boolean needCompress) throws Exception {
        BufferedImage image = QrCodeUtils.createImage(content, imgPath, needCompress);
        return image;
    }

    public static void mkdirs(String destPath) {
        File file = new File(destPath);
        // 当文件夹不存在时，mkdirs会自动创建多层目录，区别于mkdir．(mkdir如果父目录不存在则会抛出异常)
        if (!file.exists() && !file.isDirectory()) {
            file.mkdirs();
        }
    }

    /**
     * 生成二维码(内嵌LOGO)
     *
     * @param content      内容
     * @param logoPath     LOGO地址
     * @param output       输出流
     * @param needCompress 是否压缩LOGO
     * @throws Exception
     */
    public static void encode(String content, String logoPath, OutputStream output, boolean needCompress)
            throws Exception {
        BufferedImage image = QrCodeUtils.createImage(content, logoPath, needCompress);
        ImageIO.write(image, FORMAT, output);
    }

    /**
     * 获取指定文件的输入流，获取logo
     *
     * @param logoPath 文件的路径
     * @return
     */
    public static InputStream getResourceAsStream(String logoPath) {
        return QrCodeUtils.class.getResourceAsStream(logoPath);
    }

    /**
     * 解析二维码
     *
     * @param file
     *            二维码图片
     * @return
     * @throws Exception
     */
    public static String decode(File file) throws Exception {
        BufferedImage image;
        image = ImageIO.read(file);
        if (image == null) {
            return null;
        }
        BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(image);
        BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
        Result result;
        Hashtable<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>();
        hints.put(DecodeHintType.CHARACTER_SET, CHARSET);
        result = new MultiFormatReader().decode(bitmap, hints);
        String resultStr = result.getText();
        return resultStr;
    }

    /**
     * 解析二维码
     *
     * @param path
     *            二维码图片地址
     * @return
     * @throws Exception
     */
    public static String decode(String path) throws Exception {
        return QrCodeUtils.decode(new File(path));
    }
    public static void download(List<Map<String, String>> paths,String zipName,HttpServletResponse response) throws Exception{
        System.out.println(paths);
        if (paths.size() != 0) {
            // 创建临时路径,存放压缩文件
            String zipFilePath = RuoYiConfig.getDownloadPath() +"/temp.zip";
            // 压缩输出流,包装流,将临时文件输出流包装成压缩流,将所有文件输出到这里,打成zip包
            ZipOutputStream zipOut = new ZipOutputStream(new FileOutputStream(zipFilePath));
            // 循环调用压缩文件方法,将一个一个需要下载的文件打入压缩文件包
            for (Map<String, String> path : paths) {
                // 该方法在下面定义
                try {
                    fileToZip(path, zipOut);
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            // 压缩完成后,关闭压缩流
            zipOut.close();
            response.setCharacterEncoding("UTF-8");
            response.setHeader("Content-Disposition","filename=" + percentEncode(zipName));
            response.setHeader(" Content-Type","application/octet-stream;charset=UTF-8");
            //该流不可以手动关闭,手动关闭下载会出问题,下载完成后会自动关闭
            ServletOutputStream outputStream = response.getOutputStream();
            FileInputStream inputStream = new FileInputStream(zipFilePath);
            // 如果是SpringBoot框架,在这个路径
            // org.apache.tomcat.util.http.fileupload.IOUtils产品
            // 否则需要自主引入apache的 commons-io依赖
            // copy方法为文件复制,在这里直接实现了下载效果
            IOUtils.copy(inputStream, outputStream);
            // 关闭输入流
            inputStream.close();
            //下载完成之后，删掉这个zip包
            File fileTempZip = new File(zipFilePath);
            fileTempZip.delete();
        }
    }
    public static String percentEncode(String s) throws UnsupportedEncodingException{
        String encode = URLEncoder.encode(s, StandardCharsets.UTF_8.toString());
        return encode.replaceAll("\\+", "%20");
    }

    public static void fileToZip(Map<String, String> filePath,ZipOutputStream zipOut) throws IOException {
        // 需要压缩的文件
        File file = new File(filePath.get("filePath"));
        // 获取文件名称,如果有特殊命名需求,可以将参数列表拓展,传fileName
        String fileName = file.getName();
        FileInputStream fileInput = new FileInputStream(filePath.get("filePath"));
        // 缓冲
        byte[] bufferArea = new byte[1024 * 10];
        BufferedInputStream bufferStream = new BufferedInputStream(fileInput, 1024 * 10);
        // 将当前文件作为一个zip实体写入压缩流,fileName代表压缩文件中的文件名称
        String[] split = fileName.split("\\.");
        //压缩的图片的名称
//        String newFileName = fileName+"."+split[1];
//        String ss = fileName.substring(0,fileName.lastIndexOf("."));
        zipOut.putNextEntry(new ZipEntry(fileName));
        int length = 0;
        // 最常规IO操作,不必紧张
        while ((length = bufferStream.read(bufferArea, 0, 1024 * 10)) != -1) {
            zipOut.write(bufferArea, 0, length);
        }
        //关闭流
        fileInput.close();
        // 需要注意的是缓冲流必须要关闭流,否则输出无效
        bufferStream.close();
        // 压缩流不必关闭,使用完后再关
        File f = new File (String.valueOf(file));

        //压缩文件生成后把磁盘生成的图片删除
        //图片存在，可执行删除操作
        if (f.exists()==true){
            Boolean flag = false;
            flag = file.delete();
            //成功删除图片
            if (flag){
                //删除失败
            }else {
            }
            //图片不存在，终止操作
        }else{
        }
    }

}



